System board
NOTE: The system board spare part kit includes replacement thermal material.
Description Spare part number
For use only on computer models equipped with a WWAN 746017-001
For use only on computer models not equipped with a WWAN 746018-001
Before removing the system board, follow these steps:
1. Turn off the computer. If you are unsure whether the computer is off or in Hibernation, turn the
computer on, and then shut it down through the operating system.
2. Disconnect the power from the computer by unplugging the power cord from the computer.
3. Disconnect all external devices from the computer.
4. Remove the battery (see
Battery on page 32), and then remove the following components:
a. Service door (see
Service door on page 33)
b. Hard drive (see
Hard drive on page 34)
c. Optical drive (see
Optical drive on page 36)
d. Keyboard (see
Keyboard on page 45)
e. Base enclosure (see
Base enclosure on page 55)
f. USB board (see
USB board on page 64)
NOTE: When replacing the system board, be sure that the following components are removed from
the defective system board and installed on the replacement system board:
●
WWAN module (see
WWAN module on page 38)
●
WLAN module (see
WLAN module on page 40)
●
Memory (see
Memory module on page 42)
●
Processor (see
Processor on page 53)
●
RTC battery (see
RTC battery on page 73)
Remove the system board:
1. Position the computer so that the top cover is right-side up.
Component replacement procedures 69